含硼微合金钢的连续冷却相变行为Continuous cooling transformation behavior of boron bearing microalloyed steel
张志宏,薛向欣
摘要(Abstract)：
利用热模拟实验研究了一种含硼微合金钢未变形和900℃变形40%的奥氏体CCT曲线,利用光学显微镜和电镜研究冷却速度、变形对实验钢显微组织的影响。结果表明:微量硼提高实验钢过冷奥氏体的稳定性;未变形及变形试样分别在冷速2℃/s和5℃/s以上为贝氏体组织,变形提高贝氏体开始转变温度,但冷速在20℃/s以上时变形与未变形Bs温度相差较小;并且随冷速增加,显微硬度显著增加。
关键词(KeyWords)： 含硼微合金钢;连续冷却转变;显微组织;贝氏体转变
基金项目(Foundation): 国家“863”计划项目(2006AA03Z529)
作者(Author): 张志宏,薛向欣
DOI: 10.13289/j.issn.1009-6264.2012.02.024
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